Tag: urban canyon geolocation

Tests performed by Rx Networks Inc. and the European GNSS Agency (GSA) have confirmed it.

In a joint effort, a mobile location based service and technology company, Rx Networks Inc. and the GSA have tested the performance of Galileo with respect to its use when combined with GLONASS and GPS and have now released a report that reveals the outcomes of those tests and their measurements.

The tests conducted by the organizations were conducted within real world environments.

These included in indoor environments as well as in urban canyons. These types of environment traditionally pose considerable challenges to location based service accuracy as a result of the obstructions that they present to satellites, as well as because of multipath views. Each of the tests that were conducted were made up of a data capture of GNSS signals that ran for three hours. This was replayed later on in order to generate hundreds of fixes through the use of a STMicroelectronics multi-constellation GNSS receiver.

What it found was that location based service fixes were notably better with Galileo.

When Galileo was used in combination with one or more additional GNSS constellations, then there is a considerable improvement to the accuracy of location fixes when compared to the results obtained through the use of GPS on its own. This was particularly true in urban canyons and indoors.

At the same time, combining GPS and Galileo did not provide better results than combining GPS and GLONASS, but this was expected as there were only four Galileo satellites available to the testers at that time. The prediction of the researchers is that as the number of Galileo satellite launches increases, the combinations between GPS and Galileo will be able to offer a greater improvement in performance.

The GSA head of market development, Gian-Gherado Calini discussed this location based service accuracy performance test and said that “Dual-constellation GNSS designs are the standard for many smartphones and other devices. The combination of GPS and Galileo provides a robust solution and is expected to offer performance that will meet or exceed end-user expectations.” The Rx Networks senior vice president of sales and marketing, Adrian Stimpson, added that GNSS chipset manufacturers should feel that the results are “encouraging”.